Combined chuck and countersink.



i 'concern noivn that. l, ALBIN W'ILBERG, a tliefllnited Sintes, residing :it De lieoounty of Dekalb, 'and State oif invented a new Vund useful llinfoinbined Chucks and Coungrsinks, of w the following is n 'specie i ventioiirelatesto en improvement 4eoueks and countersinlrs for ,and boring machines sind 'more inulsrlyvsuch Yits rtre used in' wood-workmino jerneut i the eeconrpanying drawing, Figure 1 @Fidi-Shows iny lrproved chuck by a -vie'w in secgtil nl elevation, with the hollow stein orrolgen. away; Fig. 2 isa similar view y h i jaws ,end-f; resilier-members l erondy grffslafscetion on line Fig. l; Fig. rif-isle sec'tionzonlline 4i, Fig. l, and Fig- 5 is .fair n'larg'ed flirolien View showing the cut-- tingl end Lo`,one of the reamermeinbersl`fiie1shellToi the chuck, of cylindrical -.ripe;tnperinotovverd one end, contains oppoeitezslots71lwhere the taper begins; sind tlieltfapered; section is provided in its outer surface with: groowes 8, 8 extending' from the v :slotstoits oppositeend. ii sleeve M lng .az-flanged cylindrical threaded bend om which itl tepersiniverdly, screws et en d intolt-lie outer end of the shell nient its fflalngei against the latter; and the interior ythetapered.sectionfof thes'leeve, which con taiiisjs'n annulnrrecessli in its extremity, isi threaded, VWhile similar dianietiicnlly-oppositef recesses 12, l2. are provided in its 'onter'walls end'extend into the annular head 1Q;- .A tapering-benl for holding,l a drill fi'biliitsin thetapered end of the sleeve and isformed of similar sections i3@ held apart against the tapering sleeve-ivall by springs 16 confined between them. Moreover the' angle of taper of the inner Woll-surface of 45 the sleeve and outer surfaces of the sections 13S is such as to cause the sprending'action oit' the springs 16 on those sections to cause the holder i3 to tend to move upwardly in. the sleeve. tubular stern or shaft 17, pro- 56 vrided with e circumferential ,Jrotubersuce i3, serrer into the sleeve, iii'ording its bearing, against en. outwurdiy flanged collar i9, through 'the' niediiun of which the beers with the least friction centrally against the, wider end ,of the drill-holder; end the sono sie .el

frei-if s-finite.

@drill r,einov'ed,v showing the loity Yee/ifo i. i

diameters oi the here of the collar and stem should be alike, as shown.

In the shell-slots are pivoted between their ends similar meiner-members 20, 2O diver-ging at their outer ends in the head to prevent Cain-like sectionsv to the protuberence 18, and converging toward their opposite ends where the converging sections Work ,and arcguided in the grooves 8 und beyond win-eli they terminate in more convergent ksections provided on relatively opposite sides with cutting edges, like the one shown at 21 in Fig-1 5. Springs 22 secured to the backs oi the manier-members toward their outer ends, bear against the inner wall of 'the head l0 and tend tofspread apart those members at their cutting-edges in opposition Ato the action of the protuberance.

ly Ineens of my improved chuck, the primary object of which is to provide', as a perfniaynent fixture on and rotatable with the shell, a meiner for' countersinllng holes `@bored by the bit, the remuer-members are automatically adjusted with reference to drills oi' diiierent diameters used 1n the inicie Thus, for clamping in the holder 13V .Qection lil until the central opening between them suiliciently large to admit that drill'. The extent of protrusion of the vdrill is, of course, according' to the depth of hole it is required to bore. Tl is withdrawing movelment of the stein causes 'the springs 22 to not, by pressing the outer eam-sect1ons of the reumer-inembers inwardly, to separate the cutting-edge sections of the saine. By 4then turning the stern in the opposite direction, it drives the sections 13a inwardly or forwardly along the tapering sleeve-section to elsing) 'tlieni about find hold the inserted drill. iToen a drill of the largest diameter which tbe chuck is adapted to take is inserted, the stein i'is Withdrawn to its fullest extent shown in Fig. thereby bringing the llange of the collar l@ into the annular recess and the inner end oi the clampingheud mincir.. t Awith the; corresponding end oiL the tapered section of the shell.

i" seen., from the foregoing" deeiitedlgjnrie 1914.

4i will of the stein, and spread apart the` script-ion. the reameralways bears the same relation to the diameter of the drill Whatever that diameter lmayfbe within the ca pacity of the chuck, whereby the reamer willN properly perform its countersinking action in any diameter of hole bored by the drill. A I realize that considerable variation is possible in the details of construction specifically shown and described, and Ildo not intend by illustrating a single, specific or preferredv embodiment of my invention tov be limited thereto; my intention being, in the following claims, to claim protection upon all the novelty'there may be in my invention as broadly as the state of the art will permit.

f lVhat I claim as new and desire to secure by 'Letters Patent is l. A combined chuck and1countersink 'comprising a shell, a drill-holder in the shelh'and a yreamer .supported in the shell and having a countersink member to extend beyond the holder and coperate with adrill therein. 1 .Y

2. A combined chuck and countersink comprising a shell, a drill-holder in the shell, and a reamer comprising countersinky mem- 'bersv supported on the shell to extend' along opposite sides of and beyond said holder and having converging sections provided with cutting-edges to cooperate with a drill, in said holder, said members being adjustable relative to the drill.

3, A combined chuck and countersink' comprising a shell,; a drill-clamping holder -adjustably supported in the shell, a countersink reainer comprising members supported in the shell yand having converging forward sectionsprovided with cutting-edges to co shell and having converging forward sections provided With cutting-edges to cooperate With a drill in said holder, and atubular threaded stem Working in the shell respondingly with relation to and engaging said holderand reamer-members to adjust them. by turning the Stem, correspondingly with relation to drills of different diameters.

5. A combinedA chuck and countersinkcomprising a.l shell, a drill-clamping holder adjustably supported in'the shell, a counter.- sink reamer comprising members adjustably supported on the shell to extend along opposite sides of said holder and havin converging forward sections provided wit cutf ting-edges to coperate with a drill. in said holder, andfmeans for simultaneously ad'- justing said holder and reamer-members corferent diameters.

6. A combined' chuck taperingdrill ,-holder comprising springspread sections in said tapering section, a

drills o; difand icouutersinkM comprising a shell having a taperingfor,- Ward section and providedl With- 'v slots, al

tubular threaded stem provided With'a prol tuberance, a bearing in' the sleeve, 'into Awhich the stem screws, and a countersink reanier comprising members pivotally supported in said shell-slots and having cam- 'like outer ends spring-pressed against said protuberance and forwardv ends provided with cutting-edgesandl convergin toward a drill in said holder to coperate t erewith.'

,A combined chuck and countersink comprising a. shell containing a threaded bearing and having a. tapering forward section containing' slots, a tapering drill-holder Vcomprising spring-spread sections in said,

tapering section, a tubular' threaded stem working in the threadedbea-ring and provided With a protuberance, and a counter-- sink reamer comprising members pivotally supported in said slots to extend at one side of their fulcrums in the shell wherein their outer ends diverge and are sprin -pressed against said protuberance, and at t e opposite side'oftheir 'fulcrums alon the tapered section of the shell, lbeyond wich the for'- Ward .ends of said. members converge tolWard and are providedvvitli cutting-edges a drill -in said holder.. :ALBIN WLBERG. In presence of-y S. KRAsNioK, KARL CARLSEN.-

to coperate with 

